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Old 16th Mar 2018, 10:33
  #3043 (permalink)  
Alan Baker
 
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Originally Posted by Georgeablelovehowindia
Monarch's 720Bs had the HF fin probe: https://www.planespotters.net/photos/reg/G-AZFB

From photographic evidence, the only 707/720s that lacked the HF probe were US domestic aircraft, specifically, American's 720s (but not their 707-120s), United's 720s and TWA's 707-120s. As far as I'm aware all other 707/720s had the probe.
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